Electronically commutated motor and method of making same

Details Electronically commutated motor and method of making same Electronically commutated motor and method of making same

1974-06-24

1977-01-25

Rubinson, Gene Z.

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02K 2900

Patent

active

040053474

ABSTRACT:
A brushless DC motor is constructed with photosensitive devices for detecting rotor shaft position. Arcuate permanent magnets on the rotor provide a DC flux field while distributed stator windings, each spanning a fixed number of slots in the armature assembly, provide mutually perpendicular magnetic fields. A logic circuit comprising NOR gates and transistor switches and drivers activated in response to signals from the shaft position sensors are utilized to control current switching in the stator windings of the motor. A light interrupting shutter mounted to the rotor cooperates with the light sensitive devices which are mounted to a supporting bracket fixed to the stator assembly in a manner to selectively preset advancement of commutation of the stator windings.

REFERENCES:
patent: 3353076 (1967-11-01), Haines
patent: 3531702 (1970-09-01), Hill
patent: 3577053 (1971-05-01), McGee
patent: 3581173 (1971-05-01), Hood et al.
patent: 3633084 (1972-01-01), Rakes
patent: 3634873 (1972-01-01), Nishimura
patent: 3780363 (1973-12-01), Doemen et al.
patent: 3783357 (1974-01-01), Ichiyanage

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